We have computed the charge that develops on an SQN in space as a result ofbalance between the rates of ionization by ambient gammas and capture ofambient electrons. We have also computed the times for achieving thatequilibrium and binding energy of the least bound SQN electrons. We have donethis for seven different settings. We sketch the calculations here and givetheir results in the Figure and Table II; details are in the Physical ReviewD.79.023513 (2009).
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